Qt 4.5: dialog.cpp Example File (layouts/basiclayouts/dialog.cpp)

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# dialog.cpp Example File
layouts/basiclayouts/dialog.cpp

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     #include <QtGui>

     #include "dialog.h"

     Dialog::Dialog()
     {
         createMenu();
         createHorizontalGroupBox();
         createGridGroupBox();
         createFormGroupBox();

         bigEditor = new QTextEdit;
         bigEditor->setPlainText(tr("This widget takes up all the remaining space "
                                    "in the top-level layout."));

         buttonBox = new QDialogButtonBox(QDialogButtonBox::Ok
                                          | QDialogButtonBox::Cancel);

         connect(buttonBox, SIGNAL(accepted()), this, SLOT(accept()));
         connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));

         QVBoxLayout *mainLayout = new QVBoxLayout;
         mainLayout->setMenuBar(menuBar);
         mainLayout->addWidget(horizontalGroupBox);
         mainLayout->addWidget(gridGroupBox);
         mainLayout->addWidget(formGroupBox);
         mainLayout->addWidget(bigEditor);
         mainLayout->addWidget(buttonBox);
         setLayout(mainLayout);

         setWindowTitle(tr("Basic Layouts"));
     }

     void Dialog::createMenu()
     {
         menuBar = new QMenuBar;

         fileMenu = new QMenu(tr("&File"), this);
         exitAction = fileMenu->addAction(tr("E&xit"));
         menuBar->addMenu(fileMenu);

         connect(exitAction, SIGNAL(triggered()), this, SLOT(accept()));
     }

     void Dialog::createHorizontalGroupBox()
     {
         horizontalGroupBox = new QGroupBox(tr("Horizontal layout"));
         QHBoxLayout *layout = new QHBoxLayout;

         for (int i = 0; i < NumButtons; ++i) {
             buttons[i] = new QPushButton(tr("Button %1").arg(i + 1));
             layout->addWidget(buttons[i]);
         }
         horizontalGroupBox->setLayout(layout);
     }

     void Dialog::createGridGroupBox()
     {
         gridGroupBox = new QGroupBox(tr("Grid layout"));
         QGridLayout *layout = new QGridLayout;

         for (int i = 0; i < NumGridRows; ++i) {
             labels[i] = new QLabel(tr("Line %1:").arg(i + 1));
             lineEdits[i] = new QLineEdit;
             layout->addWidget(labels[i], i + 1, 0);
             layout->addWidget(lineEdits[i], i + 1, 1);
         }

         smallEditor = new QTextEdit;
         smallEditor->setPlainText(tr("This widget takes up about two thirds of the "
                                      "grid layout."));
         layout->addWidget(smallEditor, 0, 2, 4, 1);

         layout->setColumnStretch(1, 10);
         layout->setColumnStretch(2, 20);
         gridGroupBox->setLayout(layout);
     }

     void Dialog::createFormGroupBox()
     {
         formGroupBox = new QGroupBox(tr("Form layout"));
         QFormLayout *layout = new QFormLayout;
         layout->addRow(new QLabel(tr("Line 1:")), new QLineEdit);
         layout->addRow(new QLabel(tr("Line 2, long text:")), new QComboBox);
         layout->addRow(new QLabel(tr("Line 3:")), new QSpinBox);
         formGroupBox->setLayout(layout);
     }